Trilobita - Ptychopariida - Ptychopariidae
Full reference: W. Zhang, H. Lin, H. Wu and J. Yuan. 1980. Cambrian stratigraphy and trilobite fauna from the Zhongtiao Mountains, southern Shanxi. Memoirs of Nanjing Institute of Geology and Palaeontology 16:39-110
Parent taxon: Ptychopariidae according to S. Peng et al. 2009
Sister taxa: Achlysopsis, Altikolia, Altitudella, Amecephalites, Asthenopsis, Austinvillia, Balangcunaspis, Bathyholcus, Billingsaspis, Binodaspis, Bolaspidina, Braintreella, Brunswickia, Caborcella, Cathayanella, Chengshanaspis, Conopolus, Danzhaina, Douposiella, Elrathina, Eokaotaia, Eokochaspis, Eoptychoparia, Eosoptychoparia, Eospencia, Gaphuraspis, Gedongaspis, Gunnia, Hadrocephalites, Jangudaspis, Jiagouia, Jialaopsis, Jianchangia, Jiumenia, Kaotaia, Kochaspis, Kochiella, Kochina, Kunmingaspis, Laminurus, Laoyingshania, Lyriaspis, Meitania, Mexicella, Mufushania, Nangaoia, Nangaops, Neoblairella, Nyella, Olenekina, Onchocephalites, Pachyaspis, Panacus, Paramecephalus, Paraperiomma, Parapoulsenia, Parashuiyuella, Paraziboaspis, Piaziella, Pingluaspis, Plagiura, Plesiamecephalus, Poulsenella, Poulsenia, Probowmania, Probowmaniella, Probowmanops, Proliostracus, Psilostracus, Ptychoparella, Ptychoparia, Qiaotouaspis, Regina, Ruichengella, Sanwania, Schistometopus, Semisphaerocephalus, Shantungaspis, Shuiyuella, Sinoptychoparia, Spencella, Spencia, Stoecklinia, Suluktella, Syspacephalus, Tongshania, Townleyella, Trigonyangaspis, Tukalandaspis, Ulrichaspis, Vermontella, Volocephalina, Wanhuaia, Weijiaspis, Wuhaina, Xilingxia, Xingrenaspis, Yaojiayuella, Yuknessaspis, Ziboaspidella, Ziboaspis
Subtaxa: Monanocephalus latus, Monanocephalus liquani, Monanocephalus maopoensis, Monanocephalus zhongtiaoshanensis
Type: Monanocephalus zhongtiaoshanensis
Ecology: fast-moving low-level epifaunal carnivore